Contents
Why does a cell need carry out transcription before translation?
Transcription needs to occur before translation because the product of transcription, messenger RNA (mRNA), is the starting material for translation.
Why it is important that transcription takes place before translation?
The goal of transcription is to make a RNA copy of a gene’s DNA sequence. For a protein-coding gene, the RNA copy, or transcript, carries the information needed to build a polypeptide (protein or protein subunit). Eukaryotic transcripts need to go through some processing steps before translation into proteins.
Does transcription occur before translation?
The eukaryotic nucleus therefore provides a distinct compartment within the cell, allowing transcription and splicing to proceed prior to the beginning of translation. Thus, in eukaryotes, while transcription occurs in the nucleus, translation occurs in the cytoplasm.
What does the cell need to carry out transcription?
Transcription is carried out by an enzyme called RNA polymerase and a number of accessory proteins called transcription factors. Transcription factors can bind to specific DNA sequences called enhancer and promoter sequences in order to recruit RNA polymerase to an appropriate transcription site.
What are the steps of transcription in DNA?
Transcription takes place in three steps: initiation, elongation, and termination. The steps are illustrated in Figure 2. Figure 2. Transcription occurs in the three steps—initiation, elongation, and termination—all shown here.
What happens during translation?
In translation, messenger RNA (mRNA) is decoded in a ribosome, outside the nucleus, to produce a specific amino acid chain, or polypeptide. The ribosome then moves to the next mRNA codon to continue the process (translocation), creating an amino acid chain.
What are the three major steps of transcription?
Transcription takes place in three steps: initiation, elongation, and termination.